CN1010114B - Flushing method for hydrographic and engineering geological well drilling - Google Patents
Flushing method for hydrographic and engineering geological well drillingInfo
- Publication number
- CN1010114B CN1010114B CN 86105819 CN86105819A CN1010114B CN 1010114 B CN1010114 B CN 1010114B CN 86105819 CN86105819 CN 86105819 CN 86105819 A CN86105819 A CN 86105819A CN 1010114 B CN1010114 B CN 1010114B
- Authority
- CN
- China
- Prior art keywords
- well
- flushing
- wells
- drilling
- pumping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a well flushing method for hydrographic and engineering geological well drilling, which belongs to the field of flushing and eliminating objects for well bores. The present invention is characterized in that konjak non-clay flushing fluid is adopted for well drilling, and biologic enzymes can be used for flushing wells. Flushing fluid silted in a well wall can realize catalysis and hydrolysis by the biologic enzymes, and thereby, the pervious performance of overflow passages (cracks and pore spaces) of rock formation can be quickly recovered. The well flushing effect (the water permeability after wells are flushed / the water permeability before wells are flushed) can reach 8 to 10, and the permeation restoration ratio can reach 85% to 90%. The present invention has the advantages of low consumption, low cost, no poison, no pollution and simplicity. The method can be widely used for drilling the wells for utilizing or knowing underground hydrographic geology conditions and flushing the wells for getting rock core and water.
Description
The invention belongs in the hydrological engineering geological drilling and get rid of object realm with flushing in well.
The hydrology and engineering geology drilling well all need to keep the primary permeability of subterranean strata (crack, hole), require used flushing liquor should the effect of silting up not arranged to rock stratum (crack, hole), even or have the effect of silting up also to be easy to eliminate.In the hydrology and the engineering geology drilling well there be the employing method at present: as flushing liquor and cooperation multilayer sleeve retaining wall, consequently drilling efficiency is low, changes the footpath often with clear water, and tubing consumption is big.Another kind method is to adopt mud drilling, to solve creeping into fast and retaining wall in the complex formation, can reduce or setting of casing not, the flushing liquor of employing is conventional mud or polyacrylamide mud, eliminates the silt effect of mud to hole wall with multiple flushing well agent or pumping and washing process.Pumping and washing process commonly used has: 1. mechanical means, as use the piston well-flushing, air compressor machine well-flushing etc.2. chemical method is as with hydrochloric acid or mud acid well-flushing and based on the flushing well agent well-flushing of phosphoric acid salt composition (see and go to Japan mud investigation report 83.2, p56-57).3. physical method is as adopting liquid carbon dioxide well-flushing (seeing " coal exploration " 84, № 4, P40).4. physico-chemical process combined washing well.US-4380268 adopts and comprises the washing degreasing agent aqueous solution flushing oil gas well that primary alconol, ethylene oxide and silicate of soda are formed, and with removing paraffin and other carbohydrate, thereby improves the oil gas well yield.
Above-mentioned pumping and washing process mainly is to eliminate the rock stratum of being silted up by paraffin, clay as much as possible, needs special equipment or instrument, and the cost height is time-consuming, and can not eliminate clay silting up rock stratum (crack, hole) up hill and dale.
Task of the present invention is in the hydrology and engineering geology drilling well, after employing can be played the konjaku nonclay flush fluid drilling well of similar retaining wall effect to mud, eliminate the rock stratum and cross aquaporin (hole, crack), recover the water permeability of original rock stratum by the state that (konjaku nonclay flush fluid) silts up.Be applicable to the well-flushing of core drilling and well simultaneously.
Pumping and washing process of the present invention is to come well-flushing with biology enzyme, eliminates the konjaku nonclay flush fluid is crossed aquaporin (crack, hole) to the rock stratum the state that silts up.
The present invention at first adopts the drilling well of konjaku nonclay flush fluid, after drilling well finishes, pre-molten biology enzyme (being that water dissolves biology enzyme) is injected into well, behind natural immersion, under static pressure, make and stagnate in that the konjaku glycan catalyzing hydrolysis in the flushing liquor is a monose in the borehole wall, the water permeability of fast quick-recovery rock stratum (hole, crack), thus well-flushing finished.
The biology enzyme that well-flushing of the present invention is used is the industrial enzymes AMS, and its well-flushing consumption is that 1-2 kilogram/cubic meter hole segment body is long-pending; The plain enzyme of usable fibers or its well-flushing consumption of hemicellulase are that 0.1-1 kilogram of/cubic metre hole segment body is long-pending simultaneously.Drilling well is 6-10 with the pH value of konjaku nonclay flush fluid, and the well-flushing environment temperature is 10 ℃-70 ℃.
Use pumping and washing process of the present invention, well washing effect (the preceding water permeability of water permeability/well-flushing behind the well-flushing) is 8-10 times, and the infiltration recovery rate can reach 85%-90%.Therefore, and compare with the chemical method well washing effect in the present mud drilling, have catalytic reaction efficient height, cost is low, does not have corrosion, and selectivity is strong, for the drilling well that utilizes or understand the underground hydrology geological condition purposes is widely arranged.Also be applicable to the well-flushing of core drilling and well.
Embodiment one: adopting pH value is the konjaku nonclay flush fluid drilling well of 6-10,10 ℃-70 ℃ of well-flushing environment temperatures.Pre-molten biology enzyme is injected into well in long-pending by 0.1-2 kilogram/cubic meter hole segment body, soaks well-flushing through static pressure, 3.7 times of well washing effects, recovery rate 70% is permeated in the rock stratum.
Embodiment two: adopting pH value is the konjaku nonclay flush fluid drilling well of 7-9, and the well-flushing environment temperature is 50 ℃-60 ℃, and pre-molten AMS is injected into well by 1-2 kilogram/cubic meter hole segment body is long-pending, soaks well-flushing through static pressure.Get 6.18 times of well washing effects, rock stratum infiltration recovery rate 90%.
Embodiment three: the drilling geology condition is the celadon quartz sandstone, stratum crushing, and cranny development, the well washing hole section is a 51.34-54.45 rice, two sections in 53.90-56.90 rice.Drilling well bore Φ 76mm, adopting pH value is the drilling well of 9-10 konjaku nonclay flush fluid, 15 ℃-20 ℃ of well-flushing environment temperatures.Inject into well pre-molten 8 kilograms of/cubic metre hole segment bodies of AMS are long-pending, soak well-flushing through static pressure.9.3 times of the section of winning well washing effects, 8 times of second section well washing effects; Rock stratum infiltration recovery rate 89%.
Claims (5)
1, the pumping and washing process used of a kind of hydrology and engineering geology drilling well, be to inject into well with the washing gel breaker aqueous solution that pump is formed polymer, it is characterized in that this washing gel breaker aqueous solution adopts the pre-molten biology enzyme aqueous solution, to stagnate in konjaku glycan hydrolysis in the borehole wall through natural immersion then, recover original rock stratum water permeability.
2, pumping and washing process according to claim 1 is characterized in that biology enzyme is an AMS, and its consumption is that 1-2 kilogram/cubic meter hole segment body is long-pending.
3, pumping and washing process according to claim 1 is characterized in that biology enzyme is cellulase or hemicellulase, and its consumption is that 0.1-1 kilogram/cubic meter hole segment body is long-pending.
4, pumping and washing process according to claim 1 and 2, the pH value that it is characterized in that the konjaku nonclay flush fluid that drilling well is used is 6-10, the well-flushing environment temperature is 10 ℃-70 ℃.
5, pumping and washing process according to claim 1 and 2, the pH value that it is characterized in that the konjaku nonclay flush fluid that drilling well is used is 7-9, the environment temperature of well-flushing is 50 ℃-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86105819 CN1010114B (en) | 1986-07-09 | 1986-07-09 | Flushing method for hydrographic and engineering geological well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86105819 CN1010114B (en) | 1986-07-09 | 1986-07-09 | Flushing method for hydrographic and engineering geological well drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86105819A CN86105819A (en) | 1988-02-03 |
| CN1010114B true CN1010114B (en) | 1990-10-24 |
Family
ID=4802979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86105819 Expired CN1010114B (en) | 1986-07-09 | 1986-07-09 | Flushing method for hydrographic and engineering geological well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010114B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2599849A1 (en) * | 2011-11-30 | 2013-06-05 | Welltec A/S | Method of inhibiting corrosion of a downhole casing |
-
1986
- 1986-07-09 CN CN 86105819 patent/CN1010114B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86105819A (en) | 1988-02-03 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |